| 分子式 | |
| 其他事项 | 4.120166Sodium Carbonate anhydrousprimary standard, ACS-ISONa2CO3 M.= 105.99CAS No. 497-19-8 Assay (Acidim.) (after dried at 120°C. 2 h) 99.95 ~ 100.05% MAXIMUM LIMIT OF IMPURITIES Insoluble matter in H2O 0.005%Reducing substances I2 0.005%Nitrogen compounds (as N) 0.001%Chloride (Cl) 0.001% Phosphate (PO4) 0.001%Sulphur compounds (as SO4) 0.003% Silicate (as SiO2) 0.005%Heavy metals (as Pb) 0.0005%Al 0.001% Cu 0.0005% Mg 0.002%As 0.0001% Fe 0.0005% Ni 0.0005%Ca 0.005% K 0.005% Pb 0.0005% |
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